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From: Florian Boelstler <euphoria@arcor.de>
To: linux-rt-users@vger.kernel.org
Subject: Re: 2.6.26.8-rt16 powerpc and mem=...
Date: Wed, 18 Feb 2009 12:48:39 +0100	[thread overview]
Message-ID: <gngsin$50r$1@ger.gmane.org> (raw)
In-Reply-To: <gnet5c$7k2$1@ger.gmane.org>

Hi,

I did some further tests in the meanwhile.
If the memory is reduced to 256M with mem=256M Linux does not make use 
of highmem, since memory can be completely mapped using a single CAM entry.
(Kernel output: Memory CAM mapping: CAM0=256Mb, CAM1=0Mb, CAM2=0Mb 
residual: 0Mb)

In that case the initrd is successfully mounted at all times up to now.

When I was starting to play with mem=... on vanilla kernels I was told 
[1] that it should be trivial to allow more than three levels of CAM 
mappings. May be this is an intermediate solution.

   Florian

[1] http://ozlabs.org/pipermail/linuxppc-embedded/2008-June/030638.html


  parent reply	other threads:[~2009-02-18 11:48 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-02-17 17:46 2.6.26.8-rt16 powerpc and mem= Florian Boelstler
2009-02-17 17:54 ` Florian Boelstler
2009-02-18 11:48 ` Florian Boelstler [this message]
2009-02-18 16:13   ` Florian Boelstler

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